Grid-GridCell-Text issues :-C

Helo,

I need help about visualization in a Grid. My problem:

I'm develop a "chat" widget. I use a Grid to show the conversation (Each phrase of a contact --> One GridCell with text and image inside).

When a contact write more than one line of text, I activate the wrap:true at textElement and the height of the gridCell enough to show it. The problem is: The next gridCell that cellCreator ( or cellupdate update) when a contact write, is created under the last gridcell(last phrase), like it heigth was only of one line.

I try to find it in forums, without hit. When I create the Grid, "row" property is defined. It's posible that this property define the heigth of the GridCell and I can't change after it?

I need to use Grid because I show receive files (images) and text. There is another way to improve/make it?